It's not enough that the rate of inflation is slowing. The problem is that wages aren't going up to match inflation. When people are working two jobs and still living paycheck to paycheck, do you think it means anything to them to tell them that "um ackshually, inflation is down 0.4% from last year!"?
This kind of disconnect is exactly why we aren't reaching voters.
Biden is one of several reasons. Pelosi is another.